Steam-generator.



PATENTED SEPT. 1, 1903.

R. SGHULZ. STEAM GENERATOR.

APPLICATION FILED 0O'1.7. 1901.

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R. SCHULZ. STEAM GENERATOR.

APPLIOATION FILED 00w. 7. 1901.

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R. SGHULZ.

STEAM GENERATOR.

APPLIOATION FILED OUT. 7. 1901.

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PATENTED" SEPT. 1, 1903.

R. SGHULZ. STEAM GENERATOR.

, APPLIGATIOH mum 007:. 7. 1901.

8 SHEETS-SHEET 7.

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, 1 'PATENTED SEPT. 1, 1903.

R. SGHULZ. STEAM GENERATOR.

IIIIIIIIIIIIIIIII 0'1. 7. 1901.

NC). wearer.

Miran Srnriis Eatented September 1, 1903,

ATENT OFFICE.

STEAM- G EN ERATUR.

S?ECIIEICATION forming, part of Letters Patent No. 737,782, dated. September 1, 1903.

Application filed October 7, 1901. Serial lie. 77,908. (No model.)'

ence marked thereon,which form a part of this specification.

This invention has relation to steam-generators, and more particularly to that type in which an upper drum is connected with two or more lower drums by means of tubes, some of "which are arranged close together to form draftiiues.

The-object of my present invention lies in the arrangement of connecting tubes of com-- paratively small cross-sectional area to form the walls of draft-fines, so as to cause the products ofcombustion tofiowin an undivided stream or in a divided stream horizontally through said fines and around the groups of tubes therein to and fro about the full length of the combustion-chamber, according as the generator has two or more combustion-chamhers, with a "View to minimize the loss of heat and to utilize the latter to the best possible advantage.

My present invention has for its further object the admission into these fines at given points of products of combustion direct from the combustionchamber, together with air,

to effect the more complete combustion of those products which flow to and fro through the fines before they reach the chimney.

That my invention may be fully understood, I will describe the same in detail, reference being bad to the accompanying drawings, in which- Figures 1 ,1, 2, 3, and 4. are flue diagrams of single-furnace generators, and Figs. 5 to 16 show various constructions of such generators, Figs. 5 and 8 being elevations, Figs. 6, 0, 9, 11, 13, andl5 vertical transverse sections, and Figs. 7 l0, 12, 14, 16, and 17 horizontal sections. Figs. 18 and 19 are flue diagrams for twin-furnace generators, and Figs.

20, 21, 22, and 23 show by vertical transverse sections various constructions of such generators. Fig. 26 is a flue diagram. of a triplefurnace generator, and Figs. 24:, 24, and 25 show by vertical transverse sections-various constructions of such generators.

Referring to Figs. 1, 5, 6, and 7, D indicates the upper drum, and D D the two lower drums; O, the combustion-chamber; g, the grate, and c the chimney. The upper and lower drums are connected by two sets of tubes of comparatively small cross-section, and from Figs. 1 to 7 it will be seen that some of these tubes are arranged in a well-known manner close together to form the walls of a continuous flue of practically twice the length of the generator, as shown in Figs. 1 and 7. The products of combustion flow from the combustion'chamber O at the forward end thereof into the longitudinal member 1 of the fine formed by tubes connecting drums D and D'., thence through the cross flue memher a: at the rear end to the longitudinal flue member 2, parallel to 1, and from the forward end of said flue member 2 to the chimney c, as indicated by arrows, Figs. 1 and 7. In practice I prefer to admit fire-gases and air, preferably preheated, or another supporter of combustion to the described draftfiue at some point intermediate of its inlet and outlet, and for this purpose I prefer to form chambers in connecting fine memberw by omitting as many tubes as may be necessary and to form'suitable openings for the admission of fresh fire-gases into said chambers, together with heated air, which openings I preferably form on-either side of the longitudinal iute rmediatetube-partition, as shown in Fig. 7 at 3 as well as in Figs. 9 and Y10.

'An arrangement of draft-flue similar to the one described is shown in the constructions Figs. 1, 8, 9, 9', and 10, /Fig.'9 showing a modification in which the generator-tubes are preferably straight, and, as shown in Figs. 1 and 10, the longitudinal'fiue members 1 and 2 are also formed by tubes connecting the drum Dwith the. drums D D said flue mem bers being connected at the rear (3nd a cross connecting member m, whereby a no of about twice the length of the generator or combustion-chamber is also obtained.-

In the construction shown in Figs. 2, 11,

and 12 the tubes which connect drums D and D are arranged to form a'dividing-partition, thus forming two parallel longitudinal flue members 1 and 1, while a third longitudinal a flue composed of three longitudinal parallel members connected at their rear ends by a transverse membernamely-, a flue of nearly three times the length of-the generator or 2o combustion-chamber. A somewhat similar arrangement is shown in Figs. 3, 13, and-14, the flue member 1 at the right being formed by tubes connecting drums D and D, while the flue members 2 and 2 are formed by tubes connecting drums'D and D, theflow of the products of combustion from'the combustion-chamber 0 through flue members 1, a5, 2, and 2 to the chimney a being indicated by. arrows, and fire-gases and air are or .may

be admitted to one or both the cross connecting flue members 41:. 'In Figs. 4, 15, and 16 I have shown another arrangement of continuous flue havingfonr parallel longitudinal flue members 1 1 and 2 2, those 1 and 1 being formed by tubes connected with drums D and D and those 2 and 2 by tubes connected with said drum D and with drum D whereby a continuous flue nearly four times the length of the generator or combustion-chamberis obtained, fire-gases 1 and air being or may be admitted to the rear cross connecting flue member 0a, the flo'w oi the products of combustion from the combustion chamber through flue members 1, 1, m,

2, and 2 tothe chimney 0 being indicated by arrows in Figs. 4 and.16. In single-furnace generators the described arrangement has the advantage that the outlet of the products of combustion from the generator does 5o'not take place over the fulllength thereof 7 and on either side of the upper drum D, but.

only along a comparatively short length of v the generator and on one side" only of the upper drum. I furthermore prefer to admit the products'of combustion to the fines notalong the full height of the'latter, but in such a manner as to keep the hot products of combustion as they leave the combustion-chamher away fromthe under side ofthe upper drum and from the tubes connecting said drum at that point with the lower drums. If several boilers within a restricted space are to be connected together into a group, the connection of the combustion-chambers with '65 the chimney presents considerable difliculty.

The solution of this problem is greatly facilitated by thedescribed arrangement of fines.

flue member 2, parallel to'the flue members In the last-described arrangement I obtain The possibility of locating the chimney either at the forward or rear end of the generator, 'accordiugtothe construction of the boiler, and the'fact that the-products of combustion are notcarried around an dabove the upper drum tosuch chimney are of great'advantage in that the height of the generator is materially reduced and can therefore be installed in a comparatively low ships compartment.

, In Figs. 17 to- 231 have illustrated the application of my invention to twin furnace connected with three lower drums. In Figs. 17 and 20 the outer parallel longitudinal members 2 of the two. continuous fines are formed by tubes connecting the upper drum D with the outer lower drums D D while theintermediate longitudinal parallel members 1 1 of said two fines are formed by tubes connecting said upper drum with an'in'termediate lower drum D, the products of combustion-chambers O C! flowing through the flues, as clearly shown in Fig. 17.

Figs. 18 and 21 show a modified arrangement of the flues shown in Figs. 17 and 20 in that-the two parallel "e'ontiguo us flue members 2 2 are formed by tubes connecting drum D with drum D while the corresponding members 1 1- of the two fluesa're formed by by tubes connecting drum D with drums D'D the flow of the roducts of combustion from the combustio chambers .C O to chimney 0 through saidfiues being clearly indicated by arrows. v v y In Figs. 19, 22, and 23 Ihave shown a further modification in the arrangement of the draft-fines of twin-furnace generators in which the contiguous flue members 1 1 are formed by tubes connecting the upper drums D and D Fig. 22, with the intermediate flue, members 2 2 being formed by tubes connecting said .upperdrum or drums with the outer lower drums D'and D while the outer flue members 2 2 are likewise formed by tubes connecting said upper drum or drums with said outer lower drums D D the flow of the products of combustion from the combustionchambers C 0 through said fines to the chim- My 0 or to the two chimneys c c, Fig. 22, being clearly indicatedin Fig. 19.

In Figs. 24, 24, 25, and 26 I have shown my invention as applied to triple-furnace steam-ge erators either with suitably bent drum-connecting tubes, Figs. 24 and 25, or with perfectly straight tubes 24. rangement the flue members 1 1 on either side formed by tubes connectingthe upper drum D or the two upper druriisD and D Fig. 25,

with the intermediate dr'ums D D, while the outer flue members 2 and 2 are formed by tubes connecting v,upper drnm D or the two gppe r drums D D withltlie lower outer drums It will be observed that in the arrangement of the central combustionchamber 0 are generators having one or two upper drums tubes connecting drum 'D with drums D D the outer flue members 1 being also formed In this arjust described the fines for the three combus Lionchambers intercommu nicate, the flow of the products of combustion being clearly indicated in said Figs. 24, 24c, 25, and 26.-

Although not specifically referred to in the description of the arrangement of the fines, Figs. 17 to 26, it will be understood that in practice fire-gases are admitted directly from the combustion-chambers, together with air or other supporter of combustion, into the fiues at some convenient point or points, and preferably into a transverse connecting flue member or members.

Having thus described my invention, what I claim as new therein, and desire to secure by Letters Patent, ,is-

1. A water-tube I steam-generator com prising one or more upper drums, two or more lower drums, one or more c0mbustionchambers, watcr=tubes connecting said upper and lower drums, an outlet or outlets for the products of combustion and alongitudinal flue or fiues formed by thejuxtaposition of water v tubes, and a fine member or members extending transversely of said combustion-chamber at one end of the fire-space to connect longitudinal fines and form a horizontal continuous flue'ar'ound said chamber, substantially as described. V

2. A water-tube steam-generator comprising one or more upper drums, two or more lower drums, one or more combustion-chambers, water-tubes connecting said upper and lower drums, an outlet'for the products of combustion,alo'n gitndinal flue or flues' formed by the juxtaposition of water-tubes and a fiue' member or members extending transversely of said chamberand connectinglongitu'dinal flues to form a horizontal continuous passage forproducts of combustion around the cbam- 4o' ber, substantially as described. K I

, 3; A water-tube steam-generator comprising one or more upper drums, two or more lower drums, one or more combustion-chambers, water-tubes connecting the upper and lower drums, an outlet or outlets for the prodncts-of'combustion; a longitudinal flue'or fines formedby the juxtapositionof watertubes'and transverse fiue members connecting the ends of the longitudinal, fl'u'es-to form a continuous passage for the products of combustion around theichamber substantially asdescribed. I

. 4. A water-tube steam-generator comprisor chambers;

ing one or more upper drums, a plurality of 5.5

lower dru ms, a plurality of combustion-chain;

bers,the number of combustiomchambers less by one tharii the number of lower drums,'wa-

ter-tubes connecting the upper and lower drums, an outlet or outlets for the'prodnctsof combustion, longitudinal flue's formed by the juxtaposition of water-tubes and transverse fiues connecting the longitudinal fines to form continuous passages for the products of combustion and each continuous passage encompassing a. combustion-chamber, substantially as and for the purpose described.

In testimony that I claim the foregoing as my invention I have signed my name in presonce of two subscribing witnesses.

v I RICHARD SOHULZ; Witnesses JOHANNES HEIN,

HENRY HASPER; 

